Socket wrench provided with a staking or peening device



Oct. 10, 1950 M. VAN WINKLE, JR 2,525,386

SOCKET WRENCH PROVIDED WITH A STAKING 0R PEENING DEVICE Filed Oct. 25,1946 INVENTOR. WWW

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Patented Oct. 10, 1950 SOCKET WRENCH PROVIDED WITH A STAKIN G OR PEENINGDEVICE Marshall" Van Winkle, Jr., Oceanport, N. J. ApplicatiomOdtober25, 1946,, Serial No. 705,506

1 This invention relates to a socket wrench, and particularly such awrench in which is embodied a staking or peening device for spreadingthe end of a bolt or stud, to bring its threads into close engagementwith the threads of a nut while the latter is still engaged by thewrench.

A further object of the invention is to provide such a wrench of simpleand durable construction, adaptedfor manual or automatic operation, andin which thestaking tool is removable, replaceable and adjustable.

Another object is to provide certain improvemerits in' the form,construction and arrangement of the several parts whereby the abovenamed and other objects may effectively be attained.

A practical embodiment of the invention; is shown in the accompanyingdrawings, in which:

Fig. 1 represents a vertical axial section through the wrench, nut andbolt, in the posi- Fig. 8 represents a vertical axial section,corresponding to Fig. 1, but showing a modified form of staking tool;

Fig. 9 represents a bottom plan view of the staking tool shown in Fig.8;

Fig. 10 represents a detail axial section of the bolt of Fig. 8 beforeit has been staked or peened, and

Fig. 11 represents a detail axial section of the head and staking toolwith a spacing washer inserted.

Referring to the drawings, a socket wrench head I is shown as having anut-engaging socket 2 (single hex, double hex or square, as desired),and a square upper socket 3 for engagement with any suitable manual orautomatic turning means, the squared end of the latter being shown at 4.Above the socket 2 the head is provided with a cylindrical recess 5,which may be threaded as shown, having a diameter no greater than theminimum diameter of the 5 Claims. (01. s1-10) socket 2, and terminatingupwardly in the shoulder 6.

The staking tool] is shown as a cylindrical piece of steel, threaded toscrew into the recess 5, and having a punch 8 of suitableformprojecting-downwardly from the middle of the-tool. The punch shownin Figs. 1,.3 and 4 is in the shape of a cone having relatively steepsides and a somewhat flatter point. The height of the tool I from thepoint of the punch to the upper surface of the tool is convenientlyapproximately equal to, or less than, the depth-of the recess 5. Theupper surface of the tool is provided with a kerf 9 to receive the endof a screw-driver for inserting, removing or adjusting the tool.. Insome cases the tool may engage the recess 5 only with a friction fitinstead. of threads, and the kerf 9 is then omitted.

A modified form of staking tool It! is shown in Figs.,6 and '7, in whichthe punch II is in the form of a wide frusto-conic projection, hollowedout to leave an annular working edge I2 having a, diameter somewhat lessthan the minor diameter of the bolt in connection with which the tool isused.

Another modified form of tool I3 is shown in Figs. 8 and 9, wherein thepunch I 4 is frustoconic and of approximately the same size as the punch8, although its sides need not be so steep.

The punches of Figs. 1 and 6 are intended for use in connection with anordinary bolt I5 having the form shown in Fig. 5 or being slightlyrounded. The punch of Figs. 8 and 9 is intended to be used with aspecially prepared bolt 88, shown in Fig. 10, having a cylindrical ortapered depression ll formed in its end.

In operation, the wrench head and stakin tool are assembled as shown andmounted on a suit able turning device. The socket 2 is used to screwhome the nut I8 against the work !9, and when the nut has been tightenedto the desired degree the head is subjected to a blow or series of blowsto drive the punch into the end of the bolt, spreading it. and lockingthe nut against displacement. Such a lock is particularly desirable incases where permanence of the fastening is of primary importance, butthe expansion can, if necessary, be so controlled as to permitnon-destructive removal of the nut in other cases. Since the stakingforce is directed axially of the bolt, it is evident that, by backing upthe bolt with a suitable anvil, the bolt may be axially compressed totighten the fastening at the same Ji $1. $1.1? end is staked. The sameeffect can 3 be obtained, without an anvil, if a stud is used instead ofa bolt.

In any given assembly line bolting operation the bolts used are normallyof approximately uniform length and/or are designed to extend a uniformdistance above the work and above the top of the nuts when the latterare screwed home; the latter distance generally being from 3% to Thewrench head shown herein must be so proportioned that the socket 2 canmaintain adequate engagement with the nut throughout the turningoperation, even after the punch has made contact with the end of thebolt (or stud), and there must also be sufiicient clearance between thebottom of the socket and the work surface so that the wrench head canmove downwardly as the punch is driven into the bolt. Adjustment of thewrench head to fit the particular requirements of a given operation iseffected by moving the staking tool up or down in a recess 5 in which itis preferablythreaded. When the tool is to be held in a position spacedfrom the shoulder 6, such adjustment can be accurately maintained byinserting one or more spacers or washers 20 or the like, of appropriatethickness, between the shoulder 6 and the top of the tool, as shown inFig. 11, so that the latter cannot back off from its adjusted positionand so that the staking load need not be carried by the threads.

The punch need not be in the forms or location shown but may bepositioned eccentrically or may be divided so as to make a plurality ofindentations, but in each case it is maintained in accurate alinementwith-thebolt'endbecause of the continued engagement of the socket zwithithe nut, and uniformity of operation is thus assured.

A socket wrench having points of similarity to that disclosed herein butdesigned to effect staking of the nut forms the subject of myconcurrently filed application, Serial No. 705,505;

It will be understood that various changes may be resorted to in theconstruction, formand arrangement of the several parts without departingfrom the spirit and scope of my invention,

4 and hence I do not intend to be limited to the particular embodimentherein shown and described, but What I claim is:

1. A socket wrench head comprising, a lower socket adapted to surroundand engage the sides of a nut, an upper socket adapted to engage the endof a driving device, a cylindrical recess communicating with said lowersocket and having a diameter no greater than the minor diameter of thesocket, and a staking tool fitted in said recess and provided with adownwardly projecting punch adapted to engage the end of a bolt on whichthe nut is screwed, said recess and staking tool being screw-threaded.

2. A socket wrench head according to claim 1 in which the recesscommunicates also with the upper socket and in which the top of thestaking 'tool is shaped to engage the end of a turning tool, whereby theposition of the staking tool in the recess may be adjusted.

3. A socket wrench head according to claim 1 in which the punch issubstantially conical.

4. A socket wrench head according to claim 1 in which the punch includesan annular working edge.

5. A socket wrench head according to claim 1 in which the punch isfrusto-conical. I

MARSHALL VAN WINKLE, JR.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 864,486 Parsons Aug. 27, 19071,091,925 Ganderton Mar. 31, 1914 1,300,207 Williams Apr. 8, 19191,925,714 Crist Sept. 5, 1933 2,318,270 Wagoner May 4, 1943 FOREIGNPATENTS Number Country Date 544,265 Great Britain Apr. 3, 1942

